Improvement in millstone-picks



HENRY J. BRENNER, (-)F NA'ZAREIH, PENNSYLVANIA.

Letters Patent No. 111,810, dated February14, 1871.

IMPROVEMENT IN MILLSTONE-PI'CKS. v

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it 'may concern:

Be it known that I, HENRY J. BRENNER, of Nazareth, in the county of Northampton and State of Pennsylvania, have invented an Improved Millstone-Pick and Facing-Hammer; and` I do hereby declare that the following is a full and exact description'thereof, reference being had to the accompanying drawing making part of this specification- Figure l being a sideyiew of the instrument arranged as a pick;

Figure 2, a side view of the instrument arranged as a facer Figure 3, a top vie-w of the head of the instrument l Figure 4, an end View of the head of the pick.

Like letters designate corresponding parts in all of the figures.

The principal feature of my invention consists in the construction, whereby either one blade may be used separately for a pick, or a considerable number of blades may be attached to the handle together, side by side, to form a facing hammer.

Another feature of the invention consists in the device for attaching the 'blades to the shank or handle.

Let A represent the shaft or shank of the instrumeut, and to it a wooden handle, B, is secured, so as to be removable by passing the taper end of the shank through the handle and fastening it by a thumb-nut or key-nut, b.

To the head ofthe shank the single blade C, fig. 1, of the pick, or the several blades C DE G, fig. 2, for th'e facing hammer, are attached in the following manner: y

-The thickness of the shank-head is uniform, but the width is somewhat tapering or wedge-shape, sub- -stan'tially as shown g and in the middle of each blade is aslot just wide enough to lit closely over the thick- -ness and considerably longer than the width of the shank. Into the two ends of these slots, respectively, are inserted notched gibs d (l before the blades arc placed on the shank, the gibs being of a shape to lit the taper edges of the shan k-head. and' of such a.width that they will wedge closely against the v'shank when the blades are driven thereon in the proper position.

A cheek-plate, f, shorter than the blades," and having a slot-of the same 'size as those of the blades, is placed on each side of the blade or blades and fits in the gibs. K It' one blade is used, as in g. 1, the notches in the gibs Aare wide enough only to take in the blade and the two cheekplates f f; but if several blades are used, asin fig. 2, the gibs have notches wide enough to take in all of them and the two cheek-plates.

Then the blades are driven upon the shank-head as far as the gibs will permit, a key, g, is driven through a slot, a, in the thickness of the shank, to hold all in place; or any equivalent means of fastening may. be employed. llhus the blades can quickly be put on or removed, as occasion may'require.

The blades are all made of equal length, and properly are of cqual'width and thickness, so that any one of a set for forming a facing-hammer may be used for the pick, whereby all may be used and worn equally Among the advantages ,of this construction one is that the blades composing the facing-'hammer can all be tempered and sharpened separately and equally, and will cut and wear alike. Another is that they are very easily sharpened one by one, without going to a blacksmith to take the head apart. y Another is that two instruments are formed out of the same part-s. i

.What I claim as -myimentioin and desire to secure by Letters Patent, is-v l 1. The notched` gibs d d, blanks or cheek-plates ff, and one or more blades C DE G, in combination with the wedge-'shank or. head A, substantially as andfor the purposeherein specified.

2. The combination of the taper shankor shaft A, slotted blades C D E G, notched gibs di d, either with or without the cheek-plates ff, andthe key g, or its equivalent, constructed and arranged substantially as and for the purpose herein set forth.

Specification signed byme this 15th day of May, 1870.

HENRY J. BRUNNER.

Witnesses S MOORE, p G. G. BEITEL. 

